A novel screening method for influenza patients using a newly developed non-contact screening system - 07/08/11
Summary |
Objectives |
In places of mass gathering, rapid infection screening prior to definite diagnosis is vital during the epidemic season of a novel influenza. In order to assess the possibility of clinical application of a newly developed non-contact infection screening system, we conducted screening for influenza patients.
Materials and methods |
The system is operated by a screening program via a linear discriminant analysis using non-contact derived variables, i.e., palmar pulse derived from a laser Doppler blood-flow meter, respiration rate determined by a 10-GHz microwave radar, and average facial temperature measured by thermography. The system was tested on 57 seasonal influenza (2008–2009) patients (35.7 °C ≤ body temperature ≤ 38.3 °C, 19–40 years) and 35 normal control subjects (35.5 °C ≤ body temperature ≤ 36.9 °C, 21–35 years) at the Japan Self-defense Forces Central Hospital.
Results |
A significant linear discriminant function (p < 0.001) was determined to distinguish the influenza group from the control group (Mahalanobis D-square = 6.5, classification error rate > 10%). The system had a positive predictive value (PPV) of 93%, which is higher than the PPV value (PPV ≤ 65.4%) reported in the recent summary of studies using only thermography performed mainly in hospitals.
Conclusions |
The proposed system appears promising for application in accurate screening for influenza patients at places of mass gathering.
Le texte complet de cet article est disponible en PDF.Keywords : Non-contact, Screening, Infection, Pandemic influenza, Microwave radar, Thermography, Heart rate, Respiratory rate
Plan
Vol 60 - N° 4
P. 271-277 - avril 2010 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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